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Engineering & Industrial Petrochemical Company
(IPN) Piping Systems Research & Engineering CoTRUBOPROVOD
(NTP TRUBOPROVOD)
Member of Expert Association
of technogenic high-risk facilities
under Rostekhnadzor of the Russian Federation
Plehanova str . 7, Moscow, 1 11141, Russia
Tel.: (495) 225-94-31, 225-94-35; Fax: (495) 368-50-65E-mail:
[email protected]
NOZZLE FEM
Analysis of stresses, flexibility and allowable loads of
nozzle-shell junctionsNozzle-FEM is designed for stresses and
flexibility calculation of nozzle-shell junctions using the
Finite
Element Method (FEM). The program also calculates allowable
loads on the apparatus nozzles and estimates
operability of the nozzle-shell junctions for wide range of
geometric configurations and operating conditions. Nozzle-
FEM helps to provide higher level of the equipment safety along
with reducing labour costs at the design stage. The
program is recommended for designing and industrial safety
review of oil and gas, refining, petrochemical, chemical,
power and other industrial facilities.
Unlike the universal FEM programs (ANSYS, NASTRAN, COSMOS,
etc.), this program does not require
special training and can be used by any mechanical engineer.
Creation of finite element mesh and estimation of
calculation results are performed automatically. FEM
calculation, as opposed to semi-analytic methods (i.e. WRC
107/297, GOST 52857.9-2007, etc.), expands the program
application range and increases analysis accuracy.
Input data and structure parameters window Fragment of
calculation results
The program performs stress analysis for nozzles of arbitrary
geometry connected to cylindrical and conical
shells, as well as elliptic, hemispherical and flat heads. It
takes into account vessel boundary restraints and loads on the
nozzle from the adjacent pipeline. Both nozzle and shell
membrane, bending and total stresses can be calculated.
Calculation of the pipe cut-in connections is also implemented,
enabling detailed stress analysis of non-standard tees
and stub-ins within the pipelines.
Along with stress and stability analysis the program also
performs nozzle-shell junction flexibility calculation,
as this flexibility can considerably influence vessel and piping
stresses. During stress analysis of pipeline systemsnozzle-vessel
junctions are often simulated by anchor supports which leads to
overestimation of stresses and tensions.
In order to automatically create the appropriate non-standard
support in the calculation model, the nozzle-shell
junction flexibility calculated by Nozzle-FEM can be copied via
the clipboard into the START piping stress analysis
program.
Calculated stresses can be estimated using different codes.
Current version follows GOST R 52857.1-2007 or PNAE G-
7-002-86 (for equipment and pipelines of atomic power plants)
for allowable stresses. Shell stress and stability analysis
(according
to GOST R 52857.2-2007 or GOST 14249-89) is also implemented, as
well as reinforcement required of openings under internal
pressure (GOST R 52857.3-2007 or GOST 24755-89). Nozzle-shell
junctions working in corrosive hydrogen sulphide
environment are analysed in accordance with GOST R
52857.10-2007.
Besides finite element method calculation, the program supports
CIF and flexibility calculation via semi-analytic
methods according to WRC107-79, WRC297-87 (Welding Research
Council Bulletins No. 107, No. 297 Local stresses in
spherical and cylindrical casings caused by the external loads)
and BS5500-76 (British standard).
The program runs in Windows 9x/2000/XP/Vista.
Web: h t tp : / / ww w. t ruboprovod. ru
